Side to Side motion on a powerboat

[donradcliffe]

If you take an unstabilized trawler side on to a 2-3 meter sea (like between the Caribbean Islands on a day with the Christmas winds) you will have to hold on with both hands on the flybridge and your wife will never come on the boat again. In a planing boat, the degree of roll will not be as bad, but the motion will be quicker.

[Blaine]

Speed will lessen the rolling from beam seas, but speed in a planing hull boat cost $$. Many good suggestions above -- Check out a prescription called Promethazine -- truly awesome stuff and the least expensive solution.

Next would be a cat or trawler with stabilization. Tacking is also a good plan.

Good luck!

[Symphony]

does the lack of a flybridge make a big difference in yaw/ rolling? considering a real trawler with a flybridge compared to a sedan or lobster boat.

[rwidman]

Originally Posted by donradcliffe

......... you will have to hold on with both hands on the flybridge ......

I figured out the solution to that problem - operate from the lower helm and everyone rides below.

If the OP's wife gets sea sick on a sailboat, a trawler isn't going to help with this. Picking better days to boat and/or medicine is the solution.

[SouthernPride]

I have a 53 foot hatteras motor yacht and beam waves to 4 feet can be testy. Bow waves are much smoother into close to 6 foot due to size and weight. Both of above at apptoximately 7 to 8 knots

[rwidman]

Originally Posted by Symphony

does the lack of a flybridge make a big difference in yaw/ rolling? considering a real trawler with a flybridge compared to a sedan or lobster boat.

The higher you sit (or stand), the greater the effect of any rolling. Consider how it would be riding on the top of your mast. It's physics.

[Lepke]

Kenomac has the answer. I've been going on the ocean for about 62 years and dealt with my own and others sea sickness. I never found a person that couldn't resolve the issue with medicine and a little caution with eating and drinking.
I don't get sick anymore, but for people I take along, I have them take their medicine at bedtime the night before. Especially Dramamine. It makes you sleepy, you get a good nights sleep, and the next day is normal.

[Symphony]

Originally Posted by rwidman

The higher you sit (or stand), the greater the effect of any rolling. Consider how it would be riding on the top of your mast. It's physics.

Thanks, High Cotton!
but I was wondering if carrying the weight of the flybridge made a significant difference to the general yawing motion of a trawler. I assume in a big beam sea we'd drive from inside. heavy boat will resist rolling better, and maybe a displacement hull trawler won't roll much more than a modified V-hull lobster boat.... or not

[CaptnDen]

Originally Posted by jbinbi

Appreciate the input. At 20 to 35 kts on a 33' boat, I am assuming you are using 10-20 gph?

I'd say more on the 25-30 gph

[Cheechako]

Originally Posted by Cheechako

Yeah, on say 26-29 ft with two 250 HP outboards cruising at say 3.5k-4k rpm/35 knots speed you are going to burn 14+ gph. But you are going to get 35 miles too.
In a trawler at 8 knots you are burning 1.5-2gph So maybe 8 gallons for the 35 miles trip... more or less.

Thinking back on when we did testing on several engines, I think I got this wrong going from memory. The burn for EACH 250 HP was like 13+ gallons an hour. We found make of engine didnt matter much. Honda, Etech, Suzuki and I think Merc were tested. That would be more in line with Skipmac's Grady White burn.

[Simi 60]

^^^ higher fuel burn /nm than we use shifting 65 tonne (71 US ton) around at 8 knots.